Button-hole cutter



(No Model.)

J.- W. LUFKIN.

, BUTTON HOLE GUTTER.

No. 307,127. Pateggltedcot. 28, 1884.

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JOHN XV. LUFKIN, OF CHELSEA, MASSACHUSETTS.

BUTTON-HOLE CUTTER.`

QFECIFICATION forming part; of Letters Patent No. 307,127, dated October 28, 1884.

V Application filed July 30, 1884; (No model.)

To all zii/"wm, t 11u14/ concern:

Beit known that I, JOHN W. LUFKIN, of Chelsea, in the county of Suffolk and State of Massachusetts, have invented new and useful Improvements in Button-Hole Cutters, of which the following is a specification.

In the accompanying drawings, in which similar letters of reference indicate like parts, Figure l is a side elevation of a button-hole cutter embodying my invention. Fig. 2 is a plan view of the same. Fig. 3 is an enlarged transverse vertical section on line x, Fig. l. Fig. Il is an enlarged plan view of a portion of the mechanism shown in Fig. 3. Fig. 5 is an enlarged transverse vertical section on line'y, Fig. l.

A is the bed of the machine provided with' standards A', supporting the main shaft B, to which is rigidly secured the driving-wheel G;

D is a'lever carrying at its front end the usual cutter' or knife d, pivoted at c to the standards D', held normally in the position shown in Fig. l by the spring c', and provided next its pivotal point fwith an opening, d. By means of this opening or slot the lever E is centrally placed loosely on the same pivot c, its rear end being provided withthe strap, or collar F, swinging at E from said lever, and embracing the eccentric B', making a part of the main shaft B, the effect being,

`when power is applied to the driving-wheel C, to cause the lever vE to rock on the pivot e.

Loosely secured to the rear end of the lever D is the ratchet-wheel H, which is engaged at different times'by three pawls, I, J ,and K, held up to their work by their respective springs, t' 7' k. The pawl I is pivoted at I to the elbow-lever L, pivoted at L to the upright g, (which also constitutes a seat for the rear end of the lever D,) said` elbow-lever L being connected by a :rod or wire, 71., with a suitable treadle. The pawl J is pivoted at J to the upright y. The pawl K extends from and forms a part of the rear end of the lever x N, pivoted at N to the lever D, and adapted to be moved horizontally and carry the stepV N2, eXtendin gat right angles therefrom under and away from the front end of the lever E. As long as power is applied to the wheel C the lever E is constantly rocking; but without affecting the lever D until, by pressure upon la treadle, the rod It pulls on the bellcrank lever L and drawing the upper end toward the vratchet-wheel H causes the pawl I to push on one of the teeth of the ratchetwheel, moving the latter until the pawl K, which was lying on the top of a tooth, drops between that and the next tooth. This brings the step N2 at the opposite end of the lever N, of which the said pawl K is a part be neath the front end of the lever E, and hence between it and the lever D. Vhen the rockving-lever E drops at its front end, it :necessarily pushes down the step N2 ofthe lever N, and also the front end of the lever D and cuts the button-hole. During this last process the rear end of the lever N is of course raised, and with it the ratchet-wheel, causing the pawl J to slip over a tooth into the next lower depression. As the front ends of the levers E N D lift again, the pawl J presses against the descending ratchetswheel, turning it until the pawl I drops between the teeth, and the pawl K mounts a tooth drawing the step N2 away from the lever E, and all are agaiirin the position shown in Fig. 3, and will not operate until the elbow-lever is again pulled upon by the rod h, connecting with a treadle.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-

l. The combination of the lever E and the eccentric B and collar F, the pivot e in the standards D', the lever D, provided with the cutterd and the slot d', whereby both saidlevers bear on the same pivot, and the step N2 on the lever N,adaptedv to be pushed between said levers E D, substantially .as and for the purpose set forth.

2. The lever N, pivoted to the lever D, and provided with the step N2 and pawl K, in combination with said lever D and ratchet-wheel H, substantially as and for the purpose de- IOO and the eccentric B and collar F, said levers being pivoted at c to the standards D', in combination with the lever N, provided with the step N2 and pawl K, the uprightg, bell-crank lever L, and pawls I J, substantialhvv as and for the purpose described.v

5. The combination of the lever E, lever N, provided with the step N2, lever l), spring e', and frame, substantially as and for the purpose described.

6. The lever or cutter-bar D, pivoted at e to the frame, and provided with a loose ratchetwheel, H, at its rear end, and adapted to be engaged by suitable pawls, substantially as and for the purpose set forth.

JOHN XV. LUFKIIN.

Vitiiesses:

HENRY NV. XVILLIAMS, ARTHUR W. LUGRIN. 

